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I0OJJ > ANTENN 04.07.10 05:33l 25 Lines 900 Bytes #-5792 (0) @ WW
BID : 47586I0OJJ
Read: GUEST
Subj: Re: Antenna Question Re HF Handhelds
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Sent: 100704/0312z @:I0OJJ.ILAZ.ITA.EU #:6991 $:47586i0ojj
In article <i0o0tf$isn$1@news.eternal-september.org>,
Bob <rgsros@notme.invalid> wrote:
> How effective is a short "something" around 5 to 10 MHz, e.g. ?
>
> How can it work down there at all ?
Bob-
Like Richard, I have one of the small Radio Shack SW Receivers. I think
it was made for them by Sangean. It has a telescoping antenna that may
be as long as 36 inches when extended. No, a 36 inch antenna is not as
good as a longer wire for Shortwave reception.
Someone with a better understanding of antenna theory may be able to
calculate just how much worse it is, but suppose it receives a signal at
a 20 dB lower level (1/100th the power level or 1/10th the voltage) than
a full-size antenna. All you need is a stronger signal to make up for
it. But when propagation is good, signals can be quite strong.
Even so, it wouldn't hurt to take along some extra antenna wire!
Fred
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